<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
   <select id="province">
   	<option value="-1">省份</option>
   </select>
   <select id="city">
   	<option value="-1">城市</option>
   </select>
   <script src="3-7.js">
   	
   </script>
   
   
	</body>
</html>
